JPH11146150A - Handy scanner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a front picture even at the time of moving a device main body from the lower part of an original to an upper part by detecting the rotating direction of a roller in press contact with the picture surface of the original and allowing a picture read part to convert the order of start reading or the output order of the read image. SOLUTION: At the time of moving a device main body 1 in a direction B from a lower part of an original to an upper part, a roller 21 in press contact with the original is rotated in a direction opposite to that at the time of sub- scanning in a direction A, and a sub-scanning direction detecting means 30 outputs information showing that sub-scanning is in the direction B. A read-out driving means 40, after receiving this information, commands to start read from the opposite side of the reading starting side when the sub-scanning direction of a picture reading part 10 is the direction A, or commands to output read-out picture data from the opposite side. Thereby, at the time of moving the main body 1 in the direction B to read a picture, the read picture is prevented from becoming a rear picture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for reading an image on a document surface, and more particularly to a handy scanner for reading an image on a screen by moving an apparatus body.

[0002]

2. Description of the Related Art A conventional handy scanner comprises an image reading section for reading an image on a document, a sub-scanning amount measuring means for measuring a sub-scanning amount, and an image reading driving means for reading an image on the document at a fixed sub-scanning density. And

FIG. 1 is a schematic diagram showing a configuration of a conventional handy scanner. The image reading unit 10 of the apparatus main body 1 is caused to scan the document 2. At this time, moving the apparatus main body 1 from the upper part to the lower part of the document 2 is called sub-scanning,
This direction is referred to as a sub-scanning direction, and reading from the image reading unit in order from α to β is referred to as one main scanning line, and this reading direction is referred to as a main scanning direction.

FIG. 2 is a diagram showing a relationship between a sub-scanning direction and a read image. (1) is a diagram showing a case in the sub-scanning direction A, and (2) is a diagram showing a case in the sub-scanning direction B. First, in (1), (a) is a diagram in which a document image is sub-scanned in the direction A, and (a ') is a diagram showing a read image. In (2), (b) is
FIG. 7 is a diagram for sub-scanning the original image in the B direction.
It is a figure showing the read picture. In the conventional handy scanner, the relationship between the main scanning direction and the sub-scanning direction is fixed, and the document image (a) has a similar shape only when the sub-scanning is in a predetermined direction (this direction is referred to as an A direction). That is,
The image (a ′) is obtained (this image is referred to as a front image).

FIG. 3 is a diagram showing (1) when reading is started from the β side in FIG. 1 and (2) when outputting the read image from the β side. When reading is started from the β side of the image reading unit 10, as shown in FIG.
Becomes a read image (c) having a similar shape to that of (a), and when a command is issued to output from the β side, FIG.
As shown in FIG. 7, the original image (a) becomes an image (b) once read, and then becomes an output image (c) having a similar shape to that of (a).

[0006]

Normally, when reading an image on a document surface, the document is placed facing the operator, and the document is sequentially moved from the upper portion to the lower portion and read. Here, since the handy scanner can freely move on the document surface, there is a need to move the document from the lower part to the upper part to read an image. However, the sub-scanning direction is opposite to the direction A (this direction). If the direction is set to the B direction), the image shown in FIG. 2B '(this image is referred to as a back image) is obtained.

As described above, the conventional handy scanner fixes the relationship between the main scanning direction and the sub-scanning direction.
Even if the sub-scanning is performed in the B direction, the main scanning has a problem that the main scanning is performed only in the same direction as when the sub-scanning is performed in the A direction.

Therefore, an object of the present invention is to solve the above-mentioned problem, by providing a function of obtaining a front image even when the apparatus main body is moved from the lower part to the upper part of the document, thereby increasing the operability. It is to provide a more convenient handy scanner.

Another object of the present invention is to provide a handy scanner which has means for canceling the function and can meet the need for a back image.

[0010]

In order to achieve the above object, a handy scanner according to the present invention comprises an image reading section which moves an apparatus body on a screen of a document, reads an image, converts the image into an electric signal, and outputs the signal. In a handy scanner having a roller arranged to be pressed against the screen of the original,
Sub-scanning direction detecting means for detecting the rotation direction of the roller and outputting detection information; sub-scanning amount measuring means for measuring the amount of sub-scanning; Image reading driving means for converting the output order of the image data.

It is preferable that the apparatus further comprises a conversion function canceling means for canceling the function of changing the order of starting reading or the order of outputting read image data.

Further, the sub-scanning amount measuring means includes a first transmission mechanism having a first gear for transmitting the rotation of the roller at a sufficiently high speed, and a rotary encoder for measuring the rotation amount of the first gear. It is preferred to have

Still further, the sub-scanning direction detecting means has a second transmission mechanism having a second gear for transmitting the rotation of the roller at a sufficiently high speed, and is rotatable in contact with the second gear. A one-way clutch that engages with the support shaft and transmits rotation to the support shaft only when rotating in one direction, a disk fixed concentrically to the support shaft, and a light that is disposed opposite to and close to the side surface of the disk It is preferable to have a detection sensor.

In the sub-scanning direction detecting means, when the apparatus main body is moved in a predetermined direction, the roller rotates in a predetermined direction, and the disk rotates in the opposite direction to the roller via the second transmission mechanism. When the apparatus main body is moved in the direction opposite to the predetermined direction, the rollers rotate in the opposite direction, the transmission function of the one-way clutch is released, and it is preferable that the disc does not rotate.

Further, it is preferable that the conversion function canceling means invalidates a pulse signal output from the sub-scanning direction detecting means or a command of the image reading driving means by manual switch scanning.

The handy scanner according to the present invention is, in particular,
A roller disposed so as to be in pressure contact with the screen of the document, sub-scanning direction detecting means for detecting the rotation direction of the roller and outputting detection information, An image reading drive unit for changing the output order of the image data, and a unit for canceling a function of changing the order of the reading start of the image reading unit or the output order of the read image data are provided.

More specifically, when the apparatus main body is moved from the lower part of the original to the upper part (sub-scanning in the B direction),
The roller pressed against the document rotates in the direction opposite to the direction when the sub-scanning is performed in the direction A, and the sub-scanning direction detecting means outputs information indicating that the sub-scanning is in the direction B. The reading drive unit that has received this information instructs to start reading from the β side of the image reading unit or to output the read image data from the β side. When instructed to start reading from the β side, the original image becomes a read image having a similar shape, and when instructed to output from the β side, the original image becomes an image once read. After that, the output image has a similar shape to the original.

[0018]

Next, an embodiment of the present invention will be described.
This will be described with reference to the drawings.

FIG. 4 is a perspective view showing the configuration of an embodiment of the handy scanner of the present invention. The main body 1 of the handy scanner includes an image reading unit 10, a sub-scanning amount measuring unit 2,
0, sub-scanning direction detecting means 30, image reading driving means 4
0, a conversion function canceling means 50.

The image reading unit 10 irradiates the light emitted from the light source 11 onto the screen of the original through the transparent plate 12 and reflects the reflected light through a condensing lens 13, for example, by arranging photoelectric conversion elements in a line. And outputs it as an electric signal.

The sub-scanning amount measuring means 20 includes a roller 21 disposed so as to be in pressure contact with the original, a gear 22 for transmitting the rotation of the roller 21 at a sufficiently increased speed, and a transmission mechanism for a first gear 23. It is formed by a rotary encoder 24 that measures the amount of rotation of the first gear 23.

The sub-scanning direction detecting means 30 includes a gear 22 for transmitting the rotation of the roller 21 at a sufficiently high speed and a second gear 3 for transmitting the rotation.
1 and the transmission shaft 3 which is inscribed in the second gear 31 and engages with the rotatable support shaft 33 and rotates only in one direction.
3 includes a one-way clutch 32 for transmitting rotation to the disk 3, a disk 34 fixed concentrically to a support shaft 33, and a light detection sensor 35 disposed opposite to and close to the side surface of the disk 34.

In the sub-scanning direction detecting means 30, the apparatus main body 1
Is moved in the direction B, the roller 21 rotates in the direction B, and the disk 34 moves in the opposite direction to the roller 21 through the rotation transmission system of the gear 22, the second gear 31, the one-way clutch 32, and the support shaft 33. To rotate. When the apparatus body 1 is moved in the direction A, the roller 21 rotates in the direction A, the transmission function of the one-way clutch 32 is released, and the disk 34 does not rotate.

The conversion function canceling means 50 invalidates a pulse signal output from the sub-scanning direction detecting means 30 or a command from the image reading driving means 40 by manual switch scanning.

FIG. 5 is a diagram showing the operation of the disk 34 and the optical sensor 35. (1) shows a side pattern of the disk 34, and (2) shows an output signal of the optical sensor. As shown in (1), for example, the disk 34 has a white pattern of the same shape on a black side surface and is arranged in a circular shape at equal intervals, and when rotated, the light detection sensor is arranged so as to be opposed to and close to the pattern. 35 outputs a pulse signal as shown in (2). That is, in the sub-scanning direction B, a pulse signal is generated. If the disk 34 does not rotate, the light detection sensor 3
The output of 5 is flat.

Next, FIGS. 6 and 7 are flowcharts showing the main operation procedure of the image reading drive means 40. FIG. FIG. 6 is a diagram illustrating a case where the main scanning direction is converted, and FIG. 7 is a diagram illustrating a case where the output order is converted. The α side and β side described here are α and β shown in FIG.

When the image reading drive means 40 in FIG. 6 changes the main scanning direction, the conversion function canceling means 50 is set to "cancel" or "not cancel" (step S1).
If "not released" is set, the sub-scanning direction detecting means 30
Outputs a flat signal when the sub-scanning direction is the A direction, and outputs a pulse signal when the sub-scanning direction is the B direction to detect which sub-scanning direction is (step S2). The image reading driving unit 40 discriminates whether the signal is a flat signal or a pulse signal (step S3), and when the signal is a pulse signal, instructs the image reading unit 10 to start reading from the β side (step S4).
The image reading section 10 outputs the image data read from the β side to the outside of the apparatus (step S5). When the signal is a flat signal, the image reading driving unit 40 issues a reading start command from the α side (step S6). "Cancel" the conversion function canceling means 50
Is set, the image reading driving unit 40 issues a reading start command from the α side (step S6).

When the image reading driving means 40 of FIG. 7 converts the output order of the image data, the conversion function canceling means 5
When "not released" is set to 0 (procedure S1), the sub-scanning direction detecting means 30 detects which sub-scanning direction is (procedure S2). The image reading drive means 40 identifies the signal (step S3), and in the case of a pulse signal, instructs to output the read image data from the β side (step S4).
The image data is output outside the device (step S5). When the signal is a flat signal, the image reading driving unit 40 issues a reading start command from the α side (step S6). When the conversion function canceling unit 50 is set to “cancel”, the image reading driving unit 40 issues a command to output from the α side (procedure S
6). In addition to the above-described embodiment, the sub-scanning direction detecting means 30 may use a method in which the width of the disk pattern is gradually reduced or increased without using a one-way clutch to detect a change in the width. Further, there is a method of using a generator to identify the direction of rotation based on the polarity of voltage.

As described above, when the apparatus main body is moved from the lower portion to the upper portion of the document (sub-scanning in the direction B), the roller pressed against the document rotates in the direction opposite to the direction when the sub-scanning was performed in the direction A. The sub-scanning direction detecting means outputs information indicating that the sub-scanning is in the B direction. Upon receiving this information, the reading drive unit instructs to start reading from the β side of the image reading unit shown in FIG.
Command to output from the side. When a command is issued to start reading from the β side, the original image (a) becomes a read image (c) having a similar shape to that of (a) as shown in FIG. 3A, and is output from the β side. When you command
As shown in FIG. 3B, the original image (a) becomes an image (b) once read, and then becomes an output image (c) having a similar shape to that of (a).

[0030]

According to the present invention, in a handy scanner for reading an image on a screen by moving the main body of the apparatus, when the handy scanner is moved from the lower part of the original to the upper part to read the image, the image read is placed on the back side. This has the effect of preventing the image from becoming an image.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a scanning method of an embodiment of a handy scanner.

FIG. 2 is a diagram illustrating a relationship between a sub-scanning direction and a read image. (1) is to scan the original image in the A direction,
FIG. 2B is a diagram illustrating an image when a document image is scanned in the B direction.

FIG. 3 is a diagram showing an image. (1) is a diagram showing an image when reading is started from the β side in FIG. 1, and (2) is a diagram showing an image when the read image is output from the β side.

FIG. 4 is a perspective view showing an embodiment of the handy scanner of the present invention.

FIG. 5 is a diagram showing the operation of the disk and the light detection sensor of FIG. 4; (1) is a diagram showing a side pattern of a disk, and (2) is a diagram showing an output signal of an optical sensor.

FIG. 6 is a flowchart showing the operation of the image reading drive means (in the case where the main scanning direction is changed).

FIG. 7 is a flowchart showing the operation of the image reading drive means (in the case of changing the output order).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 apparatus main body 2 document 10 image reading unit 20 sub-scanning amount measuring unit 30 sub-scanning direction detecting unit 40 image reading driving unit 50 conversion function canceling unit 21 roller 22 gear 23 first gear 31 second gear 32 one-way clutch 33 Support shaft 34 Disk 35 Light detection sensor

Claims (6)

[Claims] 1. A handy scanner having an image reading section for moving an apparatus body on a screen of a document to read an image, converting the image into an electric signal, and outputting the signal, and a roller disposed so as to be pressed against the screen of the document. Sub-scanning direction detecting means for detecting the rotation direction of the roller and outputting detection information; sub-scanning amount measuring means for measuring the amount of sub-scanning; and receiving the detection information and reading the information into the image reading unit. Image reading driving means for converting an initial order or an output order of read image data, a handy scanner. 2. The handy scanner according to claim 1, further comprising a conversion function canceling means for canceling a function of changing the order of the reading start or the output order of the read image data. 3. The sub-scanning amount measuring means measures a first transmission mechanism having a first gear for transmitting the rotation of the roller at a sufficiently high speed and a rotation amount of the first gear. The handy scanner according to claim 1, further comprising a rotary encoder. 4. The apparatus according to claim 2, wherein said sub-scanning direction detecting means has a second gear for transmitting the rotation of said roller at a sufficiently high speed.
A transmission mechanism, a one-way clutch that is inscribed in the second gear and engages with a rotatable support shaft and transmits rotation to the support shaft only when rotating in one direction, and concentric with the support shaft. The handy scanner according to claim 3, further comprising: a fixed disk, and a light detection sensor arranged to face and be close to a side surface of the disk. 5. In the sub-scanning direction detecting means, when the apparatus main body is moved in a predetermined direction, the roller rotates in the predetermined direction, and the disk is moved through the second transmission mechanism. When the device body is moved in the direction opposite to the predetermined direction, the roller rotates in the opposite direction, the transmission function of the one-way clutch is released, and the disc is rotated. The handy scanner according to claim 4, wherein the handy scanner does not rotate. 6. The apparatus according to claim 1, wherein said conversion function canceling means invalidates a pulse signal output from said sub-scanning direction detecting means or a command of said image reading driving means by manual switch scanning. 6. The handy scanner according to any one of items 1 to 5.